Casey Hudson - Mass Effect 3 is all about answering all the biggest questions in the lore,

Mass Effect 3 is all about answering all the biggest questions in the lore, learning about the mysteries and the Protheans and the Reapers, being able to decide for yourself how all of these things come to an end.

- Casey Hudson

source: "Casey Hudson: BioWare co-created Mass Effect 3 with the (sometimes cranky) fans (interview)". Interview with Dean Takahashi, venturebeat.com. March 2, 2012.